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Emerald Group Publishing Limited
Copyright © 2011, Emerald Group Publishing Limited
Article Type: Patent abstracts From: Sensor Review, Volume 31, Issue 4
Title: Embedded fiber optic sensor for wind turbine componentsPublication number: EP 2310674 (A2)Publication date: April 20, 2011Applicant(s): Vestas Wind Sys As (DK)
A fiber optic sensor is embedded in an integral housing block formed by moulding or extrusion. The housing block has a mounting surface for attachment to a wind turbine component by adhesive or mechanical connection. In an FBG sensor, the grating of the FBG sensor is included in the integral housing block. As a result, it is not necessary to reapply the coating of the optical fiber removed when the grating was formed. In an embodiment of a strain sensor, the housing block may be separated from the turbine component by means of separated terminating sections to increase the area over which the FBG sensor’s measurement is made. Alternatively, in an arrangement where the sensor is not to detect strain, the housing block may be mounted on the component by means of a smaller mounting portion.
Title: Well monitoringPublication number: WO 2010136773 (A2)Publication date: December 2, 2010Applicant(s): Qinetiq Ltd (GB); Hill David John (GB); McEwen-King Magnus (GB); Tindel Patrick (GB)
Methods and apparatus for downhole monitoring are provided by interrogating an unmodified optic fiber arranged along the path of a well bore to provide a distributed acoustic sensor and sampling data gathered from a plurality of contiguous sensing portions of the fiber. The sampled data are processed to determine one or more well-bore parameters. The well-bore parameters may comprise a well condition profile, and may be obtained in response to an acoustic stimulus.
Title: Sensor for detecting deformation of meshes for retaining objects to protect railway linesPublication number: WO 2010040879 (A1)Publication date: April 15, 2010Applicant(s): Administrador de Infraestructu (ES); Fernandez Martin Jorge Manuel (ES); Sanchez Sanchez Jose Maria (ES); Coito Gonzalez Esteban (ES); Nunez Rivero Antoni
The invention relates to a sensor for detecting deformation of meshes for retaining objects to protect railway lines, said sensor being applicable to meshes fitted with two fiber optic lines included in as many communication circuits that detect breaks in the optical figure as a result of deformation of the mesh. Said sensor comprises a casing that is attached to the mesh, is crossed by the optical fibers, and includes two parallel strip provided with two conical apertures, between which are attached, by as many setting elements, two pulls arranged in different directions, and fitted with an aperture located in front of one of the pairs of conical apertures which enable the passage of each optical fiber through each group of three opposing apertures, breaking the fiber, when pulling with a force greater than the force set, of the pulls that are connected to the mesh and to a tensioner thereof.
Title: Endoscope system, endoscope, and driving methodPublication number: EP 2245980 (A2)Publication date: November 3, 2010Applicant(s): Fujifilm Corp (JP)
An endoscope includes an elongated tube. An objective lens system is disposed in the elongated tube, for passing image light from an object. A fiber optic image guide includes plural optical fibers bundled together, has a distal tip, is inserted through the elongated tube, for transmitting the image light focused on the distal tip by the objective lens system in a proximal direction. A displacing device displaces the distal tip laterally and periodically upon receiving entry of the image light being focused by use of a piezoelectric actuator positioned outside the distal tip. An image sensor creates images in plural set positions of the distal tip. First to fourth images among the plural images created consecutively are combined to form a first synthesized image. Then second to fifth images among the plural images without use of the first image are combined to form a second synthesized image.
Title: Rapid three-dimensional photoacoustic imaging system based on ultrasonic plane array detector and method thereofPublication number: CN 101813672 (A)Publication date: August 25, 2010Applicant(s): Univ South China Normal
The invention discloses a rapid three-dimensional photoacoustic imaging system based on an ultrasonic plane array detector which has the advantages of simple operation, low manufacturing cost and convenient detection and an imaging method thereof. The rapid three-dimensional photoacoustic imaging method based on the ultrasonic plane array detector mainly comprises the following steps: adopting a laser pulse to excite ultrasonic signals which can produce a light-induced thermal elastic effect, collecting photoacoustic signals in parallel simultaneously with a plane array detector and multiple array elements, processing the signals in a three-dimensional phase-controlled algorithm, and reconstructing an optical absorption and distribution image for a sample to be detected. The three-dimensional photoacoustic imaging device comprises a photoacoustic excitation source device, a photoacoustic signal receiving and collecting device and a computer component. The invention overcomes the defects of the traditional technology such as low imaging speed, poor stability due to long-term system operation, complex device and the like, simultaneously combines the advantages of pure acoustics and pure optical imaging, and can provide images reflecting optical absorption and distribution of tissues. The device of the invention has the advantages of simple structure and easy promotion.